Kneading-machine.



v H. P. BARR.

, KNEADING MACHINE.

APPLICATION FILED Mum, 190s.

' 918,494. Patented Apr. 20,1909.

3 SHEETS-SHEET 1.

H. P. BARR.

KNEADING MACHINE. APPLICATION FILED Mum, 1905.

918,494. Patented Apr. 20, 1909.

3 SHEETS-SHEET 3.

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chines and perfecting their operation, the

HARRY P. BARR, OF EAST ORANGE, NEW JERSEY.

KN E ADING-MACHINE Application filed March 2, 1905. Serial No. 248,126.

Specification of Letters Patent.

Patented April 20, 1909.

To all whom "it may concern:

Be it known that I, HARRY 1.. BARR, av

citizen of the United States, resident of East Orange, county. of Essex, State of few Jersey, have invented certain new and useful Improvements in Kneadiug-lvlachines, of which the following is a specification.

My invention relates to improvements in machines for kneading plastic substances, such as dough, and has for purposes the simplifying of the mechanism of such macheapening of their cost and reducing the power necessary to drive them and the labor of supervision, preparation and cleaning.

I have discovered thatby subjecting the dough to pressureiin channels or passages of varying area, the dough in its passage from the wider to the narrmver ortion of the kneading chamber is subjectec to a kneading action which thoroughly intermingles the parts of the dough while subjecting it to continuous pressure and accomplishing a very rapid and thorough kneading of the dough.

Broadly considered, therefore, my invention consists in amachine adapted to subject the dough-to kneading action in a chamber having a restricted area through which the dough is compelled to pass on its way to a further kneading operation. And preferably, the arrangcment pf parts isuch as to force the dough repeatedly through such restricted area or arcas of the chamber until the kneading operation is completed. The construction of the kneading area of the chamber may be made by narrowing or converging the walls of the ki'ieading chamber at a point or points. or enlarging the crosssection of the kneading member or members at a part or parts.

A further valuable function of my machine is the causing of the dough to move in orderly manner through the kneading mem-- bers consecutively-the parts being so arranged that the dough, .on leaving on'e kncading member or channel is directed to the next member r channel and subjected there to further kneading action, instead of being all treated in mass'without assurance that all the donghwill be subjected to the consecutive action ofv all the kneading members.

My invention is especially adapted to that class of kneading machines in which spirally 9 formed or screw shaped doughwerking members are employed. Such members have been heretofore used in connection with kneading machines, but; usually. in con nection with additional kneading or doughworking instrumentalities, no way having been heretofore suggested of rendering such sc -e: -shaped kneading members sullicient alone to completely and homogeneously knead the mass. I have found that by imparting a proper shape to the contour of the bottom of the pan or trough and arranging the kneading screw in proper relation there- 'to. the complete kneadingof dough may be :u:compiished by the mere coaction of the trough and screws upon the dough without the addition of other supplementary kneading devices; and my invention consists in this coi'istruction and arrangementof the mcchanisn'i and additional details of construction which will be first described with reference to the accompanying drawings and then pointed out in the claims.

I do not intend to hereby imply that my invention mightnot be present also in a machine which has in addition to the kneading screws and the peculiarly shaped trough herein described additional kneading devices so long as the same embodies the essential features of in'iprovemcnt of my invention hereinafter pointed out.

In the drawings: Figure l is an end view of the dough kneading machine. taken at the operating end of the machine. Fig. isa transverse sectional view of ihetrough and kneading screws. Fig. 3 is a. top view of a .dough kneading machine embodying my invention. part of the supportmg frame and drivii'ig mechanism being broken away. Fig. -l a partial end view, taken at the opposite end of the machine from that. shown in Fig. 1. Fig. 5 is a vertical sectional view in a plane .ii'idicated by the line A A, Fig. 5-). Figs. at and 5 are to a larger scale than tln remaining figures.

The frame 1 is preferably of hollow cas iron, shaped to attord suitable support to the trough and the kneading and troughoperating n'iechanism. The trough or pan 9 hasthe four supporting hubs or arms 2", 2",. l, l, surrounding the screw shafts and sup porting the pan thereon, or, preferably as here shown, long enough to extend into bearings on the frame 1 and support the pan, while atlording bearing for the said shafts. The hubs are, preferably, of the represented cylindrical form and two of them, to wit: the projections 3. form pivot trunnions '15 return it to the first end. Itis apparent.

however, that a similar result will be reached whereupon the pan or trough may be turned up from its normal horizontal position when 5 rthe dough is to be discharged.

struction adopted by me enables the maintenance of the driving connection With the screws irrespective of the position, of the pan.

Theportion 5 of. the screw shafts to winch the threads Bare fastened are, as shown in Fig. '3, preferably tubular inform. The screws are preferably of the same direction of-pitchso that when turned in opposite -directions one wall feed the dough toward 1 one end of the machine and the other screw, taking it fromthat end of the machine, 'Ill bynsing a right-handed screw on one shaft I and a left-handed. one on the other and driv- .20

ing them iii the same direction. To secure the proper kneading action on the; dough, the screws. are, preferably, of considerable 5 width and'are placed at some distance apart, ,therespective widths and distances being substantiallyindicated in Figs. .2 -and This construction while efficient in effecting the'kneading of the dough vhich is brought incontact with the kneading screws would usually present this ,difliculty there is left between the kneading screws a space in which some of the dough would gather, re-

the feeding action imparted to the remainder'of the dough in the pan, and

' peresentingjas it were an eddy which would made up either of entirely unkneaded dough or of dough only partially kneaded tially, ,unchang'ed in character.

and "ving oif from time to time to the mass lumps or bodies of unkneadedor partiflly kneaded douglnand some of it reuntil the end of said operation, fixed in position and entirely, or substan- This imperfect action I have entirely overcome by providing .7, either ormed of. a separate piece from the body of the pan and rigidly fastened thereto,

or, preferably, as shown "inFig. 2, formed by the proper shaping of the material of the bottomof thejpan itself. This ridge may extend only partly, but preferably, as here shown, 'extendsdiagonally substantially en-'- tirely across the space between the screws, 3 as most clearly appears in Fig. 3, and is so disposed as to present a narrowing channel or trough to the dough as it is forced from g one end to the otherof the pan. It may be of the height of the pan, but I have found it sutlicient to make it only a part of that height, as here shown. The screws revolving in the direction of the short arrows in Fig. 3, will feed the dough in the direction of the long arrows in the said figure alternately from one end to the other of the pan, and the gradual contraction of the trough'toward the end to which the dough is fed will cause all The con- 1 in the bottom of the pan the ridge' i or the dough to be brought continually under the actionot the kneading screws.

T he bearing hubs :L of the pan rest merely l in open bearings in the top of the pan, but

f, the trunnions 3 are held in their bearings by straps 8 so that the pan may, as already mentioned, be turned up about the trunmons n o for discharging the dough. lhe shafts a of the screws may extend directly through i side of said trunnion the driving gear 9. A

end-thrust of this end of the shaft. At 15 I provide a trap for dough and oil creeping along the'spindle, and within the trap the spindle is grooved or ribbed circumferentlally at 15 to arrest the creeping of dough and oil and cause them to deposit in the trap whence they escape at 15". At the other end of the machine the spindle 10 engages the end of the pipe 5 by a tapering joint 17 and forcing'andholding ,of the parts together,

dough trapping means 15, 15 are provided at this end of the machine.

gear engaging a screw 21 of the shaft 22 position of the pan.

The main driving-shaft 27 receives Its moit to the inter-meshing gears 9, 10, by any suitable intermediate mechanism, as for ex ample, by the intermediate gearing 28,-v 29, 30, 31, 32, the last member of which engages 5 gear 9. 4

- \Vhile I have shown-only a singlepair of j kneading members,' it is'apparent that any number of screws in excess of two, for example, three or four'may be used the same arrangementof the rib or ridge between the contiguous screws as here shown being follwithout departing from the e$entia1 prinf formed upon a'spindlc 13 which has bearingin the tl'UIlXlIOIiZ and has keyed upon it out ball-bearing, or roller bearing-1i, takesthe l l the nut 18 having hand-.wheel it) enables the Similar ball or roller bearings 14 and oil and I F or tilting the trough to discharge the contents I provide upon it at- :20 a segment-f which has a gear 23 meshing with the gear 24 on shaft 25 operated by hand-wheel 26, The gear segment 20- is concentric with the trunnions 3 and therefore with the shaft passing through said trunnions and its driving gear with which the gear lOof the other screw shaft is in constant mesh, whatever he the lowed, It is further apparent that theeon- Z struction may be modifiedin variousways' 3? tionfrom any suitable power and transmits mverging toward one end'and at that end ing member.

.ciple ofinvention of having the two kneading members operating inseparate or partly separate ehannels, each channel conserving to discharge the dough to be taken into the broad end of the channel of another kneading member.

' 'Having thus describeo my invention what I claim: as new and desire to secure by Leters Patent is 1. In a dough kneading machine, the conr bination of a pan, kneading members therein 1 revolving toward each other, and directing 1 the dough, while kneading it, downward between the said members, and means in said pan for gradually directing the mass of dough while subjected to the kneading action, from one kneading member to the other;

2. In a dough kneading machine, the combination of a pan and a kneading member or members, so constructed and arranged that by the operation of the kneading member or members the dough isforced through a restricted channel or area'while it is subjected 1101118 compressive and kneading action of the kneading member or members and then into a channel or chamber where it is sub- 'jected to further kneading.

'3. In a dough kneading machine, the combination of a pan and a kneading member or members, so constructed and arranged that by the operation of the kneading member or members the dough is repeatedly forced through a restricted channel or area while it is sub ected to the compressive and kneading action of the kneading member or members and theninto a channel or chamber where it is subjected to further kneading.

4. In a machine of the cha *acter described, the combination of a plurality of dough kneading members, and a pan therefor having a channel wherein each member works smaller at one end than the other, the

channels of the respective kneading members being so disposed that the dough issuing from the small end of one channel is directed to the large end of another channel.

' 5. In a machine of the character described, the combination of a kneading pan, oppositely acting kneading members therein, and an interposed diagonally disposed dough directing member between said kneading members, arranged to direct the dough to: ward one end of one kneading member and toward the opposite end of the other knead- 6. .In a machine of the character described, the combination of substantially parallel longitudinally-acting kneading members. and a containing pan having a diagonally disposed ridge on its bottom.

7 In a machine of the character described. the combination of longitudinallvkneading members, and independent troug s for the kneading members, each actin acting .other and the kneading members operated to fepd the dough from the small end of one trough to the'large end of the other trough.

S. In a machine of the character described, the combination of longitudinally kneading members, independent troughs for the kneading members, each trough being smaller at one end than'the other, and means for feeding the material being treated from the small end of one trough to the larger end ofthe other trough.

9. In a mixing and kneading machine two continuous feeding and mixing spirals journaled in a mixing and kneading trough and interconnected by gearing adapted to rotate them always toward each other; in combination with an intermediate diagonally disposed and upwardly extending rib 1n the bottom of the mixing and kneading trough, the arrangement being such that the material is given, by one'of the spirals, a continuous forward, downward, and'compressivc action from one end of the trough to the other,-

while the other gives to it a like continuous forward, downward and QQIDPIGSSIVG action 111 reverse direction. whereby all of-the material is simultaneously moved and subjected to a mixing and compressing action.

10. In a machine of the character described, the combination of substantially parallel longitudinally acting kneading members, and a containing pan having independent troughs for said members smaller at one end than the other the small end of each trough being adjacent to the larger end of the other trough.

11. In a machine of the character de-. scribed, the combination of substantially parallel kneading screws pitched and driven to propel the dough in opposite directions, and :1 containing pan having a ridge-shaped bottom diagonally disposed in the space bctween the kneading screws.

12.111 a machine of the cha'acter described, the combination of the substantially parallel screw-shaped kneading members pitched and driven to propel the dough in opposite directions, and :1 containing pan having its bottom formed witha ridge extending diagonally across the space between said kneading members.

13. In a machine of the cha'actcndcscribed, the con'ibination of :1 containing pan, separable kneading members within the pan, having at one end heads 11 provided withdowel sockets, supporting spindles for said kneading members, having at one end dowels engaging the said sockets, and suitable driving mechanism for said spindles, substantially as set forth.

HARE P. BARR. lVitnesscs \Vnmmn P. Hinnroxo, I'IARRY E. KNIGHT. 

